Title:
POWER CONVERSION DEVICE AND ABNORMALITY DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/155524
Kind Code:
A1
Abstract:
A power conversion device (1) is provided with a power conversion unit (11), a rotating direction detection unit (12), and an abnormality detection unit (13). The power conversion unit (11) converts inputted power and supplies the converted power to an electric motor (51). The rotating direction detection unit (12) detects the rotating direction of the electric motor (51) on the basis of a sensor signal outputted by a speed sensor (52). The abnormality detection unit (13) detects a change of the rotating direction, and calculates the frequency of change of the rotating direction. The abnormality detection unit (13) further detects an abnormality in the electric motor (51) and/or the speed sensor (52) on the basis of the frequency of change of the rotating direction.
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Inventors:
YOSHIDA TAICHI (JP)
Application Number:
PCT/JP2018/004027
Publication Date:
August 15, 2019
Filing Date:
February 06, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P29/024
Foreign References:
| JP2002089133A | 2002-03-27 | |||
| JP2009024548A | 2009-02-05 | |||
| JPH10271601A | 1998-10-09 |
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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